The Amazon FWS API allows you to automatically process shipments to Amazon and then out to customers. This functionality is contained in two key APIs.
Additional API's from Amazon:

Amazon Simple DB API

Amazon Flexible Payments Service API

Amazon E-commerce Service API

Amazon Elastic Compute Cloud (EC2) API

Provider: Amazon.com	Submitted By: APIFinder.com Staff
License: Open (free)	Email: Email this contributor
Price: 0	Connection Protocols: SOAP
Notes: An Amazon merchant account, AWS account, and an API Key are required for use of this API.
Functions: E-commerce
Languages/OS: Web Service, Java, .NET